exhausted rodi membrane can make better waste water ratio?

[fr3n0z]

Hi all,

A doubt. Water out of my tap is 52F.

With my old (2year old) 50GPD 4 stage rodi i get a 2:1 ratio and 1 liter in 7 minutes (that is like over the 50gpd production..it's like 55GPD). It has a 300CC flow restrictor

I have just bought a 100gpd system and i get a 4.5:1 ratio and 1 liter in 6 minutes (that is 64GPD). It has a 800cc flow restrictor

Something is weird.

Water quality out of the 2 system is good. tap water has roughly 45PSI and water is quite hard.

Is it possible that old system membrane got exhausted and give me a better ratio? Any idea what is going on or how to troubleshoot and understand?

 

[Randy Holmes-Farley]

Important data missing is the tds from each.

 

[SteveMM62Reef]

You may have gotten away with no booster pump on your old system, but you will need one for your 100 GPD System.

 

[fr3n0z]

Important data missing is the tds from each.

TDS from tap 182ppm. 2ppm tds from old 50gpd system and about 7ppm from new system. The 2 system are from 2 different brands (Aquili the old 50gpd and Arka the new 100gpd) ....to keep in mind that new system it does not have yet the resin cartridge installed when tested, so is only a 3 stage during testing).

You may have gotten away with no booster pump on your old system, but you will need one for your 100 GPD System.

Ok so the lack-ish of pression can give me this kind of problem (under-production on the new system)? It just seems weird that old system is over-producing with a good ratio and with a 50F water going in.


You guys think that would be a good idea to try a booster pump?

 

[danreef55]

Take a look at this https://www.bulkreefsupply.com/7-stage-pro-75-gpd-ro-di-system-bulk-reef-supply-bundle.html
Add three extra cartridges and get a booster pump
Low water pressure feeding a reverse osmosis system can cause poor water production and even low water quality. If you are feeding your membrane with less pressure than the specified amount by your particular membrane manufacturer, we highly suggest adding a booster pump.

The ideal operating pressure of your RO/DI system depends on the particular RO membrane your using and the typical range is 50 - 90 PSI. Anything less than 35 PSI is considered sub-par and will most certainly affect the performance of your RO membrane. Water pressure can be measured using the pressure gauge installed on your RO/DI system.

Booster pumps can be installed almost anywhere before your RO membrane and if you use a float valve to turn off your RODI system, a pressure switch can be employed to automatically turn your booster pump on and off when the RO system is making water.

Installing a booster pump is easy and requires minimal tools to plumb into your existing RO/DI reverse osmosis filter system. These instructions are specific to the AquaTec Booster Pump Kit that comes with the power supply and pressure switch. The AquaTec pump works great with our BRS Reverse Osmosis Systems but is also widely compatible with most standard RO/DI systems.

 

[fr3n0z]

Take a look at this https://www.bulkreefsupply.com/7-stage-pro-75-gpd-ro-di-system-bulk-reef-supply-bundle.html
Add three extra cartridges and get a booster pump
Low water pressure feeding a reverse osmosis system can cause poor water production and even low water quality. If you are feeding your membrane with less pressure than the specified amount by your particular membrane manufacturer, we highly suggest adding a booster pump.

The ideal operating pressure of your RO/DI system depends on the particular RO membrane your using and the typical range is 50 - 90 PSI. Anything less than 35 PSI is considered sub-par and will most certainly affect the performance of your RO membrane. Water pressure can be measured using the pressure gauge installed on your RO/DI system.

Booster pumps can be installed almost anywhere before your RO membrane and if you use a float valve to turn off your RODI system, a pressure switch can be employed to automatically turn your booster pump on and off when the RO system is making water.

Installing a booster pump is easy and requires minimal tools to plumb into your existing RO/DI reverse osmosis filter system. These instructions are specific to the AquaTec Booster Pump Kit that comes with the power supply and pressure switch. The AquaTec pump works great with our BRS Reverse Osmosis Systems but is also widely compatible with most standard RO/DI systems.

I am in France ....then what i was worried about installing a booster pump is that it will increase waste water. I tought of that because randy told me in another post that cold water is more efficent if is going slow. I have 50F (now in summer) water out of the tap (i live in the mountains). I will try to put a booster pump in new system to see how it will work.